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Construction method of quantitative evaluation model for the maturity of korla fragrant pear

International Journal of Agricultural and Biological Engineering 2022年第4期15卷 243-250页

作者： Shihui Yu Yurong Tang Haipeng Lan Xiaolong Li Hong Zhang Yong Zeng Hao Niu Xiaozhen Jin Yang Liu College of Mechanical and Electrical Engineering Tarim UniversityAlaer 843300XinjiangChina College of Mechanical and Electronic Engineering Shandong Agricultural UniversityTai’an271018ShandongChina Zibo Agricultural Machinery Service Center Zibo 255000ShandongChina

The maturity variation laws of korla fragrant pears were explored for a quantitative evaluation of harvest maturity to solve the reasonable matching between harvest maturity of korla fragrant pears and market quality demands.korla fragrant pears from different harvesting periods were chosen as the research objects.Some quality indexes were chosen as the evaluation indexes per industry standards,including hardness,soluble solid content(SSC),single-fruit weight,fruit longitudinal diameter,fruit equatorial diameter,pericarp color parameters(L*,a*,and b*),and titratable acid.Variation data of these quality indexes with accumulated temperature were collected.Scores of several quality indexes were gained through principal component analysis.A mathematical model of scores and accumulated temperatures was constructed.On this basis,a quantitative maturity model of korla fragrant pears was constructed.Results demonstrate that SSC,single-fruit weight,fruit longitudinal diameter,fruit equatorial diameter,L*,a*,and b*are significantly and positively correlated with the accumulated temperature.Meanwhile,hardness and titratable acid showed significant negative correlations with the accumulated temperature.Relations between scores of principal components and accumulated temperature conform to the Sigmoidal model.The constructed quantitative maturity model of korla fragrant pears can quantify the maturity of pears.Research conclusions can provide insight into the harvest periods,evaluate korla fragrant pears’maturity,and lay a theoretical foundation for quantitative research on fruit maturity.

关键词： korla fragrant pear quantitative evaluation maturity principal component analysis accumulated temperature

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Non-destructive detection of the fruit firmness of korla fragrant pear based on electrical properties

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International Journal of Agricultural and Biological Engineering 2022年第6期15卷 216-221页

作者： Hong Zhang Yang Liu Yurong Tang Haipeng Lan Hao Niu Hong Zhang Modern Agricultural Engineering Key Laboratory at Universities of Education Department of Xinjiang Uygur Autonomous Region Tarim UniversityAlaer 843300XinjiangChina College of Water Resources and Architectural Engineering Tarim UniversityAlaer 843300XinjiangChina College of Mechanical and Electrical Engineering Tarim UniversityAlaer 843300XinjiangChina

In order to achieve the non-destructive detection of the firmness of korla fragrant pear during the ripening period,the characteristic variables integrating the parallel equivalent inductance(Lp),quality factor(Q),parallel equivalent capacitance(Cp),dissipation factor(D),parallel equivalent resistance(Rp)and impedance(Z)were formulated through principal component analysis(PCA).Further,based on the characteristic variables,the models were established for predicting the firmness of korla fragrant pear by using the generalized regression neural network(GRNN)and back-propagation neural network(BPNN).The results showed that firmness has significant correlations with the six electrical parameters.The first two principal components(PCs)were selected as the characteristic variables of the electrical parameters.GRNN exhibited the best performance in predicting firmness(R2=0.9628,RMSE=0.383).The results could provide important references for non-destructive detection of the quality of korla fragrant pear.

关键词： korla fragrant pear firmness electrical properties principal component analysis non-destructive detection

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Transcriptome analysis to identify candidate genes related to chlorogenic acid biosynthesis during development of korla fragrant pear in Xinjiang

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Food Science and Human Wellness 2022年第4期11卷 854-864页

作者： Hao Wen Wenqiang Wang Xi Jiang Minyu Wu Hongjin Bai Cuiyun Wu Lirong Shen Department of Food Science and Nutrition Zhejiang Key Laboratory for Agro-Food ProcessingZhejiang UniversityHangzhou 310058China College of Horticulture Forestry Tarim University of Land-ReclamationAral 843300China

korla fragrant pear(KFP)with special fragrance is a unique cultivar in Xinjiang,China.In order to explore the biosynthesis molecular mechanism of chlorogenic acid(CGA)in KFP,the samples at different development periods were collected for transcriptome analysis.High performance liquid chromatography analysis showed that CGA contents of KFP at 88,118 and 163 days after full bloom were(20.96±1.84),(12.01±0.91)and(7.16±0.41)mg/100 g,respectively,and decreased with the fruit development.pears from these typical 3 periods were selected for de novo transcriptome assemble and 68059 unigenes were assembled from 444037960 clean reads.One‘phenylpropanoid biosynthesis’pathway including 57 unigenes,11 PALs,1 PTAL,64CLs,9 C4Hs,25 HCTs and 5 C3’Hs related to CGA biosynthesis was determined.It was found that the expression levels of 11 differentially expressed genes including 1 PAL,2 C4Hs,34CLs and 5 HCTs were consistent with the change of CGA content.Quantitative polymerase chain reaction analysis further showed that 8 unigenes involved in CGA biosynthesis were consistent with the RNA-seq data.These findings will provide a comprehensive understanding and valuable information on the genetic engineering and molecular breeding in KFP.

关键词： korla fragrant pear Development period Chlorogenic acid content De novo transcriptome assembly Phenylpropanoid biosynthesis pathway

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Response of Leaf Tissue Structure to Exogenous ABA in korla fragrant pear

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Journal of Northeast Agricultural University(English Edition) 2017年第4期24卷 25-30页

作者： Zhou Wei-quan Cheng Gong Mansuer·Nasier Yang Wen-Li Zhao Shi-rong Qi Yan-qiao Zhang Shi-kui Liao Kang Featured Fruit Tree Research Center Xinjiang Agricultural University Urumqi 830052 China Luntai Fruit Resources Nursery of Xinjiang Academy of Agricultural Sciences Luntai 841600 Xinjiang China

To study the effects of different concentrations of Abscisic Acid(ABA) on leaf tissue structure of korla fragrant pear and lay the foundation for the cultivation and regulation of korla fragrant pear. Using the paraffin section method, the leaf thickness, the epidermis thickness, the palisade tissue thickness and the sponge tissue thickness were measured; palisade spongy ratio, Cell Tightness(CT) and Cell Looseness(CL) were examined after treatments with exogenous ABA. Leaf thickness, leaf palisade spongy ratio and palisade tissue thickness increased significantly after exogenous ABA treatment compared with CK, while the effect on leaf epidermis was not obvious. The leaf thickness and palisade tissue thickness increased evidently after 70 mg · LABA treatment by 24.89% and 41.10%, respectively. The tissue structures of leaves were more compact, while CL was lower after 70 and 90 mg · LABA treatments. The effects of different concentrations of exogenous ABA could increase the leaf thickness, palisade tissue thickness of korla fragrant pear and CT, reduced the thickness of spongy tissue and CL. Among those concentrations of exogenous ABA, the effect of spraying 70 mg · Lexogenous ABA was suitable for improving cold resistance of korla fragrant pear.

关键词： korla fragrant pear ABA leaf tissue structure

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Study on the Effect of Water-Storage Irrigation Technology in korla fragrant pear Planting

Study on the Effect of Water-Storage Irrigation Technology i...

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2011 International Conference on New Technology of Agricultural Engineering(ICAE 2011)

作者： Deng Zhong1 2 Feng Junjie 1 Zhai Guoliang 1 Liu Yang 1 Zhang Wenzheng 1 1.Farmland Irrigation Research Institute Chinese Academy of Agricultural Sciences Xinxiang 453003 china 2.College of Water Resources and Hydro-electric Engineering Xi an University of Technology Xi an 710048 china

Applying the system of water storage irrigation to korla fragrant pear yielding according to it’s principle,we studied the change of soil water in field,growth characters of tree and the effect of yield and fruit quality under water storage irrigation and conventional flood irrigation.The results showed that the soil water content of the root zone of fragrant pear was notably increased in the way of water storage irrigation especially in 0 60cm layers,in which higher than flood irrigation in whole growing stages.Capacity of tree absorbing water from soil enhanced with soil water content increased,so chlorophyll content and leaf water content were notably increased and appeared positive linear correlation between them.Growing stage of tree advanced and nutritional characters markedly improved under water storage irrigation,fruit setting percentages and single fruit weight were increased,also fruit shape index is improved.The first order fruit rate increased by 17.19%compared to flood irrigation,yield is increased 16.37%,and WUE increased by 45.26%.Fruit sugar acid ratio is promoted under water storage irrigation,and fruit hardness was decreased,so improved the fruit savor.

关键词： Water-Storage Irrigation korla fragrant pear Growing characteristics Yield and quality

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Comprehensive evaluation of korla fragrant pears and optimization of plucking time during the harvest period

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International Journal of Agricultural and Biological Engineering 2022年第3期15卷 242-250页

作者： Zhentao Wang Yurong Tang Xiaozhen Jin Yang Liu Hong Zhang Hao Niu Haipeng Lan College of Mechanical and Electrical Engineering Tarim UniversityAlar 843300XinjiangChina Zibo Agricultural Machinery Service Center Zibo 255000ShandongChina

To optimize the harvest of korla fragrant pears and to provide a theoretical basis for post-harvest processing,a total of 26 basic indices of korla fragrant pears,including their morphology,quality,and softening age,were investigated.The harvest period ranged from August 22nd to October 6th,samples were collected every 5 d(totally 10 plucking days,indicated as H1-H10).The results indicated that changes in pectin content were the main causes of softening in fragrant pears.The scavenging of free radicals mainly occurred because of the collaborative effects of superoxide dismutase(SOD)and catalase(CAT).In the harvest periods H1-H3,the hardness,titratable acid(TA),chlorophyll content,density,and diameter of the stone cells,as well as the cellulose and hemicellulose content of the korla fragrant pears were at their highest.During the periods H7-H10,the single-fruit weight,fruit horizontal and vertical diameter,color coordinates L,a*,b*,soluble-solids content(SSC),SOD activity,CAT activity,and water-soluble pectin were higher than in the other plucking periods.The highest vitamin C(VC)content and moderate values for a variety of indicators were observed during H3-H7.Variations in the korla fragrant pears during H1-H3 mainly manifested through changes in softening-related parameters.During H3-H10,changes in the softening-related,aging-related,color-related,and quality indices had a dominant role.On this basis,some suggestions for the post-harvest processing of fragrant pears have been proposed.Fruit,during H1-H3,are suitable for transportation and storage;during H7-H10 are suitable for fresh-eating and further processing;and during H3-H7,exhibited moderate values for a variety of indicators and had the highest commercial value.This research provides a systematic evaluation of the characteristics of mature korla fragrant pears during the harvest period and can form the basis for fruit quality control and processing of korla fragrant pears.

关键词： korla fragrant pear harvest period plucking time quality fruit maturity evaluation optimization

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Changes in Soil Organic Matter,Nitrogen and Phosphorus Contents during Decomposition of pear Branches

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Asian Agricultural Research 2023年第4期15卷 47-51,60页

作者： Yaxuan ZHONG Rukeyanmu Matistic Aikebaier·Yilahong Turnisa Matiturum Setivaldi Abdushik College of Resources and Environment Xinjiang Agricultural UniversityUrumqi 830052China Agricultural Economy and Agricultural Technology Service Station of Kan Township Qapqal Xibe Autonomous CountyYili 835100

[Objectives]To investigate the changes in soil organic matter,nitrogen and phosphorus content in the decomposition process of korla fragrant pear branches by indoor mixed culture.[Methods]The branches of korla fragrant pear in the orchard were collected and returned to the field for a period of 150 d for indoor mixed culture.[Results]Different ages of korla fragrant pear branches have different effects on soil nutrient content during the simulated return to field decomposition process.Compared with the control in the same period,the treatment of returning to field reached a significant level(Ppear branches,and the overall improvement effect of 10-year-old trees was better than that of 5-year-old trees.Returning the pruned branches to the field can provide a reliable theoretical basis for solving the problem of organic fertilizer shortage in orchards,and also can ensure technical support for improving soil fertility and improving the rhizosphere micro-environment of pear trees.

关键词： korla fragrant pear Decomposition of branches Soil nutrient content

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Prediction method for nutritional quality of korla pear during storage

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International Journal of Agricultural and Biological Engineering 2021年第3期14卷 247-254页

作者： Yang Liu Qiang Zhang Hao Niu Hong Zhang Haipeng Lan Yong Zeng Fuguo Jia College of Engineering Northeast Agricultural UniversityHarbin 150030China College of Mechanical and Electrical Engineering Tarim UniversityAlarXinjiang 843300China College of Engineering Huazhong Agricultural UniversityWuhan 430070China

It is difficult to control the quality of korla pear with different degrees of maturity during storage.Here,a method was proposed for predicting the effects of harvest maturity and cold storage time on the quality indices(soluble solid content(SSC)and Vitamin C(Vc)content)of korla pear.The generalized regression neural network(GRNN)and adaptive neuro-fuzzy inference system(ANFIS)were employed to predict the quality changes of korla fragrant pear fruit during storage.The results demonstrated that during cold storage the SSC in pears with 10%-70%harvest maturity showed continuous increases in the first 90 d of storage and then a slight decline thereafter,while that in pears with 80%and 90%harvest maturity exhibited slow decreases throughout the storage process.With the extension of storage time,the Vc content of pears with 10%-90%harvest maturity showed continuous decreases.The harvest maturity of korla pear was extremely positively correlated with SSC and Vc content(ppear fruit during storage.The ANFIS with the input membership function of gbellmf had the best performance in predicting the SSC(RMSE=0.175;R2=0.98),and that with the input membership function of trimf exhibited the best performance in predicting Vc content(RMSE=0.075;R2=0.99).The research findings can provide reference for predicting the fruit nutritional quality at delivery and decision-making on the storage time of korla fragrant pear.

关键词： korla fragrant pear harvest maturity storage time nutritional quality prediction method

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